f(f(x)) = rac{(N/D)^3 - 3(N/D)}{(N/D)^2 + 1} = rac{ rac{N^3 - 3ND^2}{D^3} }{ rac{N^2 + D^2}{D^2} } = rac{N^3 - 3ND^2}{D^3} \cdot rac{D^2}{N^2 + D^2} = rac{N^3 - 3ND^2}{D(N^2 + D^2)}

Tue, 21 Apr 2026 15:39:43 +0000

Content under review